See also [http://forums.nekochan.net/viewtopic.php?f=3&t=16725883 this] and [http://forums.nekochan.net/viewtopic.php?f=3&t=16725878&start=15 this] topic.

{| class="wikitable"

{| class="wikitable"

−

|+ EPROM information

+

|+ EEPROM information

|-

|-

! VPro

! VPro

! Computer

! Computer

−

! part#

+

! Part#

−

! eeprom id

+

! EEPROM ID

|-

|-

−

| V10,

+

| V10

| Fuel, old rev.

| Fuel, old rev.

| 030_1725_00x

| 030_1725_00x

| ASTODYB

| ASTODYB

|-

|-

−

|V10,

+

|V10

| Fuel, new rev.

| Fuel, new rev.

| 030_1826_00x

| 030_1826_00x

| ASTODYV10

| ASTODYV10

|-

|-

−

|V12,

+

|V12

| Fuel

| Fuel

| 030_1726_00x

| 030_1726_00x

| ASTODY

| ASTODY

|-

|-

−

|V12,

+

|V12

+

| Fuel

+

| 030_1996_00x

+

| ASTODY

+

|-

+

|V12

| Tezro

| Tezro

| 030_1884_00x

| 030_1884_00x

+

| ODY128B1_2

+

|-

+

|V12

+

| Onyx350 InfinitePerformance

+

| 030_1909_00x

| ODY128B1_2

| ODY128B1_2

|-

|-

|}

|}

−

+

'AST' is for 'Asterix', the codename for Fuel. 'ODY' is short for Odyssey, the codename for VPro graphics.

−

+

== Graphics subsystem ==

== Graphics subsystem ==

Line 81:

Line 91:

== V6/V8 Pixel Clock Issues ==

== V6/V8 Pixel Clock Issues ==

−

The first generation of VPro boards ([[V6]] & [[V8]]) have a design flaw that prohibits graphics modes in much of what might otherwise be considered the normal range for SGI desktop systems:

+

{{:V6/V8_Pixel_Clock_Issues}}

−

* Modes in the 109-193MHz range cannot be selected at all on [[V6]]/[[V8]].

+

−

* Modes that are close to the lower end of that range (like 1280x1024_59/60) are only allowed at 8 bytes/pixel framebuffer size and even at that setting some people reported display problems (noise, flickering).

+

−

+

−

Pertinent nekochan.net discussions about these issues can be found [http://forums.nekochan.net/viewtopic.php?f=3&t=10153 here] and [http://forums.nekochan.net/viewtopic.php?f=3&t=13591 here].

Latest revision as of 07:40, 25 April 2013

Contents

General information

The VPro series (code name "Odyssey") is a a computer graphics architecture for SGI workstations. First released on the SGI Octane2, it was subsequently used on the SGI Fuel and SGI Tezro workstations. VPro provides some very advanced capabilities such as per-pixel lighting, also known as "phong shading", and 48-bit RGBA color.

There are currently four different VPro graphics board revisions, called: V6, V8, V10 and V12. The first series were the V6 and V8, with 32MB and 128MB of RAM respectively. The V10 and V12 had double the geometry performance of the older V6/V8, but were otherwise similar. The V6 and V10 can have up to 8MB RAM allocated to textures, while V8 and V12 can have up to 104MB RAM used for textures.

Modes that are close to the lower end of that range (like 1280x1024_59/60) are only allowed at 8 bytes/pixel framebuffer size and even at that setting some people reported display problems (noise, flickering).

Pertinent nekochan.net discussions about these issues can be found here and here.

1: 24" monitor recommended for correct aspect ratio
2: 1280x1024 at 60Hz (available with 8-byte frame buffer depths, supports 4-bit per component RGBA, double-buffered with Z)
3: Support for some resolutions requires installation of IRIX 6.5.10 or higher
4: Resolutions designated for the Dual Channel Display (DCD) Option on V12 only are in skew mode for timing compatibility; while the two displays can have different resolutions, they must run at the same refresh rate
5: 1280x492 at 114Hz available with V6 and V8